Fishing-tool



PaIenIedAug. 30,1921.

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FISHING TOOL. APPLICATION FILED DEC. 28. 19.20,.

UNITED STATES OSCAR '.B. BUTTON', 0F 'BAXTER iiPRfIlGs,y KANSAS.

FISHING-Toor..

Specication of Letters Patent.

Application filed December 28, 1920. Serial No. 433,646.

T o all whom it may concern:

Be it known that I, OSCAR B. DUTTON, a

citizen of the UnitedStates, residing at Baxter Springs, in the countylofCherokee and State ofKansas, have invented certain new and usefulImprovements in Fishing-Tools, of which the following is aspecification.

rIhis invention relates to fishing tools, and it comprises a casing,.gripping members slidably mounted in said casing, a spring arranged insaid casing and adapted to hold said gripping members in inoperativeposition, a breakable pin/or member limiting the action of said spring,'a cutting .member arranged on Said springl and engaging said breakablemember whereby said breakable member will be cut or'severed when violentjarring occurs and the gripping members will assume an inoperativeosition.

In the use of fishing tools, t e difliculty'that has been constantlyencountered is that when the slips or engaging jaws have gripped thelost tool in' the well, there is no way to break the hold if the toolcannot be pulled out. Quite frequently, a portion of the lost tool willengage the sides ofthe well casing or other obstruction in Such' mannerthat pulling will cause it to become wedged and morediflicult to remove.In such instances, it is necessary to break the hold-on thetool,

and at the present time,this canonly be accomplished by jarring thefishing tool until it is broken or until theishing tool is re leasedfrom the rod and left in the well...

In the present invention, I have provided y a fishing tool having slipsor gripping jaws arranged to grip the lost tool and remove 1t from thelwell in which means are to release the lost tool if. it becomes wedgedin the side walls or cannot be removed for any other reason.

In the accompanying drawmgs, I have shown one Iembodiment of theinvention. In

this showing :h

Figure 1 is'asectional view showing thev slips inoperative position, v

Fig. 2 is a similarview showing the slips in inoperative position,

Fig. 3 is' -a planl view of the cutting member,

Fig. 4 is av central vertical sectional view thereof, f

Fig. 5 is a-horizontal sectional view on line 5 5 of Fig. 2, and y Fig.6 is a Similar .view on line 6--6 of Fig. 2.

provided vby ` and t tool is so firmly embedded or obstructed asPatented Aug. 30.1921.

Referring to the drawings, the reference numeral 1 designates a sectionof the fishing rod whlch is provided with a threaded eXtension for thereception of another section, .formlng-the rod by means of which thefishing tool is lowered into the well-in the ordinary manner. The shellor casing 3 of the fishing tool is provided with internalscrewthreadsatits upper end, and is adapted to be screwed upon thelower end 4 ofthefishing rod. The lower end of the rodl is provided with a steel pin 4"toprevent injury of the cutting member.

The shell or casing is hollow and is provided with a restricted opening`5 at its lower en d, the restricted opening communicating with theinterior by means of a substantially conicalportion 6. The grippingmembers 7 are Slidably mounted within the casing and are provided withgripping jaws 8, at their lowerend, the inner faces of which may beserrated, as at 9, to assist in gripping the lost tool. The casing isprovided with two sets of openings 10 and 11. A Steel pin 12 is adaptedto be arranged in one of the lower openings 10. i A coil spring 13 isarranged within the arms 7 of the .'pping member and is supported bythis pm. A blade 14 is arranged on the upper end of the spring, theblade being provided with upwardly projecting cutting members 15. Awooden pin 16 is arranged in one of the upper openings 11, thecuttingmembers 15 being maintainedin engagement therewith by'the spring.

rfhe operation of the device is as follows:

With the parts in the position shown in Fig. 1 of the drawings, theSpring 13 is under tension and tends to'move the vcutting wardly. Thisupward movement is limited the pin 16. TheA cutting members bear,against the wooden pin, but do not engage A it with suiiicient force tosever it under ordinary conditions. When a lost tool is to be removedfrom a well, the fishing tool is lowered into position inthe usualmanner, and\ the tool is engaged by the jaws 8, the downward movement ofthe jaws through the conical portion 6 of the shell', forcing them intoengagement with the lost tool. The fishin tool may then be lifted fromthe well ge lost tool recovered. When the lost to prevent upwardmovement of the fishing too with the lost tool attached, by. reasonableupward jarring and it becomes necessary to break the hold of thegripping jaws 8 from the lost tool, a downward jar or drive on thelishing tool and associated parts, continued ashort time, will force thecutting members 15 to sever the pin 16. When the pin 16 is severed, thecoil spring 13 moves the cutting member and the slips or grippingVelements upwardly, causing the gripping jaws to move upwardly into thelarge portion of the hollow casing or`shell, and thus releasing thetool. The fishing tool may then be removed from the well withoutbreaking it, or losing it, and a new pin inserted. 'Ihe steel pin 4engages theupper end of the gripping element and prevents the cuttmgedges 15 from contacting with the end of the rod and thus being damaged.

It is to be understood that the form of my invention herewith shown` anddescribed is to be taken as a preferred example of the same, and thatvarious changes in the shape, size, and arrangement of parts may beresorted to without departing `from the spirit of theinvention or thescope of the subjoined claims.

Having thus claim:

1. A fishing tool, comprising a shell or casing, gripping membersslidably mounted therein, a spring engaging said gripping members andadapted to move them upwardly to an inoperative position, a pinextending a'cross said casing to prevent upward movement of saidgripping members, and means for severing said pin to permit said springto move the gripping members to inoperative position.`

2. A fishing tool comprising a shell or casing, gripping membersslidably mounted therein, a coil spring engaging said gripping describedmy invention, I

members and adapted to retain them in inoperatlve posltion, means fornormally overcoming the action of said coil spring, and

means* for rendering said first mentioned means inoperative.

3. A fishing tool comprising a shelll or casing, gripping membersslidably mounted therem, said gripping members being so arranged thatthey will grip a tool when in extended position, but are renderedinoperative when in retracted position, a coil spring arranged in saidcasing and adapted'to retain said gripping members in inoperativeposition, a pin arranged across said casing adapted to normally overcomethe action of said spring, and means for removing said pin to permitsaid spring to retract the gripping members.

c 4. A iishingtool comprising a shell or casing, gripping membersslidably mounted therein, the lower end of said shell or casing beingprovided with a restricted opening to cause said gripping members toengage a tool, said gripping members being inoperative when in retractedposition within said casing, a coil sprin arranged in said casing andadapted to retain said gripping members in inoperative position, abreakable pin arranged in said casing and normally maintainingsaid coilspring under tension and said jaws in operative positiomand a cuttingmember arranged between said spring and said pin whereby said pin may besevered to permit retraction of said gripping members. In testimonywhereof I aiix my signature in presence of two witnesses.

OSCAR B. DUTTON. Witnesses:

JosEPHINE CLovER, S. H. BoGLAN.

